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2G FM531 on transmission

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Lilbloody4

10+ Year Contributor
85
1
Feb 14, 2010
Schweinfurt, Europe
Alright I'm puting the engine back together for installation, does anyone know why it say's FM531 on my trans??? I see that this is for a non turbo, anyone know the specs on this trans??? It only lines up for 4 bolts... Is that ok???
 
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Alright I'm puting the engine back together for installation, does anyone know why it say's FM531 on my trans??? I see that this is for a non turbo, anyone know the specs on this trans??? It only lines up for 4 bolts... Is that ok???

Yeah the FM531 is the 1996-1999 2.4L Eclipse Spyder transmission. You would need the FM533 for a 2g 4G63 FWD manual transmission. I would get the proper transmission.

Not sure what that has to do with removing your A/C and PS though. :confused:
 
I dont understand why people remove the A/C and power steering, like youre going to get 2 more HP out of the belt not being there. Its stupid to even try to drive a 2900 pound car without P/S. And whats custom and fabrication about this thread?
 
I dont understand why people remove the A/C and power steering, like youre going to get 2 more HP out of the belt not being there. Its stupid to even try to drive a 2900 pound car without P/S. And whats custom and fabrication about this thread?

You must have girl arms if you can't drive one of these without PS.

They do it to make room. Weight reduction. I lost like 70-80lbs just from removing AC and PS :)
 
You must have girl arms if you can't drive one of these without PS.

They do it to make room. Weight reduction. I lost like 70-80lbs just from removing AC and PS :)

Agreed haha. I looped mine at the rack and you can easily make slow turns one handed. 2900lbs is pretty light isnt it? Anyway its looks 1000 times better under the hood with p/s and a/c gone.
 
I dont understand why people remove the A/C and power steering, like youre going to get 2 more HP out of the belt not being there. Its stupid to even try to drive a 2900 pound car without P/S. And whats custom and fabrication about this thread?

Not that this has anything at all to do with the OP's question but I removed my A/C about 5 years ago and have never regretted it. Removing the A/C system alone is over 60 pounds in weight loss, plus with it gone the engine bay looks cleaner, there is no condenser blocking the radiator, more room for a FMIC, easier to get to the alternator belt and entire timing side of the engine, plus the 2 horsepower you mentioned because of less parasitic draw from the crank. Win win to me. :thumb:
 
I plan on ripping out my ac as soon as I get a chance. If I can find something to do the loop with, I may also remove the ps. Otherwise, I think I'll keep it for autocross.

Otherwise, also confused about why an 3g eclipse spyder tranny is in his 2g and he posted about ac and powersteering... LOL
 
You must have girl arms if you can't drive one of these without PS.

They do it to make room. Weight reduction. I lost like 70-80lbs just from removing AC and PS :)

i just took out my ac i saw close to 50 pounds for for the ac
 
What did you forget to remove? I weighed all the components and it was a little over 60 lbs. The compressor, condensor, under the dash stuff, fuse/relay box, lines, etc.

i didn't take out the under dash stuff.
 
Yeah the FM531 is the 1996-1999 2.4L Eclipse Spyder transmission. You would need the FM533 for a 2g 4G63 FWD manual transmission. I would get the proper transmission.

Not sure what that has to do with removing your A/C and PS though. :confused:

So, your saying junk the tranny and get another one??? There aren't many DSM parts here in Germany...:sosad: I got the tranny bolted up to the engine... Its only by 4 bolts but everything is connected to my 6 Bolt fine...
 
Delete the AC and PS, I didnt even loop the lines and it was still very streetable... Both of my DDs dont have PS... I even run 16x8 wheels with a 245/50/16...
 
So, your saying junk the tranny and get another one??? There aren't many DSM parts here in Germany...:sosad: I got the tranny bolted up to the engine... Its only by 4 bolts but everything is connected to my 6 Bolt fine...

Contact Shep Trans. They specialize in DSM transmissions. Call (330) 832-2366 or e-mail [email protected]

You can also contact Jacks Transmissions or Dogbox Racing. All three shops are DSMtuners supporting vendors and they all specialize in DSM transmissions.

I have used the F5M33 transmission (turbo fwd) on a 1g originally equipped with the F5M22 (2.0 n/t) before but those are both 4G63's so it's not as big of a deal. In your case you are using a 4G64 transmission on a 4G63 engine.

Ask one of the pros but post the response you get here so we will know for next time.

Hope this helps!
 
Yeah the FM531 is the 1996-1999 2.4L Eclipse Spyder transmission. You would need the FM533 for a 2g 4G63 FWD manual transmission. I would get the proper transmission.

In Europe, the F5M31 came on the non-turbo 4G63 2G as well.


Alright I'm puting the engine back together for installation, does anyone know why it say's FM531 on my trans??? I see that this is for a non turbo, anyone know the specs on this trans??? It only lines up for 4 bolts... Is that ok???

It can be, depending on which bolt it is. If the mounting situation is anything like putting a 6-bolt in a 2G with the 2G transmission, then the bolt 20999U to the right (front of the car) in the attachment below is the one that doesn't line up, which is perfectly fine. In that situation, 20999Q (threads into transmission back side; all others thread to engine block), 20999Y, the top 20999U, and 20999V must all be in place.

It doesn't sound like it, but I want to make certain you aren't counting starter motor mounting bolts as those bolts are not included in this diagram or in mounting the transmission.
 

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In Europe, the F5M31 came on the non-turbo 4G63 2G as well.

Very interesting.

I've been going a little searching on the topic this morning. Here is some of what I have found:

Here is a thread, http://www.dsmtuners.com/forums/drivetrain-tech/378239-f5m33-f5m31-all-one.html, with 2 members who both have 2G's that have both the F5M33 and F5M31 stamps on there GST's. I'm not sure if this is common or not though.

This thread, http://www.dsmtuners.com/forums/drivetrain-tech/204698-f5m31-97-gst.html, covers the same issues. Some guys with both model numbers, this thread suggests that all 2g GST transmissions could have both model numbers, not sure if that is true or not.

At least from a 1G prospective, the F5M31 was only available in the Galant and Expo. It should bolt up, but might have a bellhousing like that of the F5M22, in that it has a smaller inner bell area for use with a smaller diameter flywheel.

The F5M21, F5M22, and F5M31 all have lighter radial bearings on the intermediate shaft and input shaft. The F5M33 has tapered bearings for the larger torque loading provided by the turbo engine.

I'm not sure why the trans would have two different trans model numbers on it. My guess is it's a F5M31, which likely needs the smaller diameter flywheel (educated guess, because I've not had my hands on one). Really, you need the F5M33, but you can make the F5M31 work.

I don't have any 2G spyder manuals, so I can't verify the availability of F5M31, but in my 3G manuals, the spyder shows a F5M42 being used with the 2.4.

^ DSMtuners Wiseman

I bolted my F5M31 tranny in my 1g talon when my tranny (F5M33) went out. but the axles didnt match up . i guess you'll need galant axles also... it didnt work for me gear oil spilled out everywhere....

Summary,

The F5M31 has lighter radial bearings then the F5M33 so if you are planning on making more power then stock you might have a problem with the transmission lasting.

It also looks like you may need to be concerned with the clutch/flywheel combo as well as the axles using the F5M31 transmission. You should use the clutch/flywheel that matches the transmission, not the engine.

I would still recommend calling one of those DSM transmission shops. Let us know what you find out.
 
Summary,

The F5M31 has lighter radial bearings then the F5M33 so if you are planning on making more power then stock you might have a problem with the transmission lasting.

It also looks like you may need to be concerned with the clutch/flywheel combo as well as the axles using the F5M31 transmission. You should use the clutch/flywheel that matches the transmission, not the engine.

I would still recommend calling one of those DSM transmission shops. Let us know what you find out.


Here's a thread you may or may not have seen concerning the axles: http://www.dsmtuners.com/forums/newbie-forum/379115-different-driveshafts-gs-gst.html#post152296770

All 2G FWD 4G6 vehicles with manual transmissions use the same flywheel and starter mounting plate; only AWD flywheels are different. Interestingly, the starter mounting plate for a 2G AWD automatic transmission is the same as that used for the FWD transmissions while the AWD manual transmission plate is different. The correct clutch/pressure plate to be used with the 2G F5M31 are those equipped on the Spyder, transmission specific as you mentioned. Here's some OEM part numbers to better explain things.

EDIT: The bolded portion above is not absolutely true. The Spyder N/T has a different flywheel than the FWD turbo cars. However, the FWD turbo flywheel can be used on the Spyder along with the turbo clutch and pressure plate.

For MD974388 (F5M31-2-ZVZT used in Europe):
Clutch Disk - MD746411
Pressure Plate - MD746631

For MD972017 (F5M33-2-SPZT used in U.S., 2.0L 4G63T, including turbo Spyder):
Clutch Disk - MR446227
Pressure Plate - MD747787

For MD974389 (F5M31-2-VVXT used in U.S., 2.4L Spyder):
Clutch Disk - MD746411
Pressure Plate - MD746631

The following is all conjecture, but with that information it would make sense to me for people to swap the F5M33 bellhousing onto the F5M31 transmission as a low cost alternative to rebuilding or purchasing a F5M33 transmission if the original has gone out for one reason or another. It would allow them to keep the F5M33 clutch equipment. Again, it is not fact but is a possibility, although it does seem a bit unlikely because of the frequency of occurrences. Those are some interesting posts you brought up.

For lower power levels, it seems like a perfectly suitable thing to do and, in my opinion, there is no reason to throw out or "junk" a perfectly usable transmission.
 
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Here's a thread you may or may not have seen concerning the axles: http://www.dsmtuners.com/forums/newbie-forum/379115-different-driveshafts-gs-gst.html#post152296770

All 2G FWD 4G6 vehicles with manual transmissions use the same flywheel and starter mounting plate; only AWD flywheels are different. Interestingly, the starter mounting plate for a 2G AWD automatic transmission is the same as that used for the FWD transmissions while the AWD manual transmission plate is different. The correct clutch/pressure plate to be used with the 2G F5M31 are those equipped on the Spyder, transmission specific as you mentioned. Here's some OEM part numbers to better explain things.

For MD974388 (F5M31-2-ZVZT used in Europe):
Clutch Disk - MD746411
Pressure Plate - MD746631

For MD972017 (F5M33-2-SPZT used in U.S., 2.0L 4G63T, including turbo Spyder):
Clutch Disk - MR446227
Pressure Plate - MD747787

For MD974389 (F5M31-2-VVXT used in U.S., 2.4L Spyder):
Clutch Disk - MD746411
Pressure Plate - MD746631

The following is all conjecture, but with that information it would make sense to me for people to swap the F5M33 bellhousing onto the F5M31 transmission as a low cost alternative to rebuilding or purchasing a F5M33 transmission if the original has gone out for one reason or another. It would allow them to keep the F5M33 clutch equipment. Again, it is not fact but is a possibility, although it does seem a bit unlikely because of the frequency of occurrences. Those are some interesting posts you brought up.

For lower power levels, it seems like a perfectly suitable thing to do and, in my opinion, there is no reason to throw out or "junk" a perfectly usable transmission.

Ok so the 2g non turbo 4G63 (europe) and turbo 4G63 axles and flywheels are the same. That is good for the OP. But if he uses this F5M31 transmission he would need to get the clutch/pressure plate that corresponds with the F5M31.

Alright I'm puting the engine back together for installation, does anyone know why it say's FM531 on my trans???

Lilbloody4, Was this F5M31 transmission the one that was on there when you pulled your engine or did you get this somewhere else?
 
Ok so the 2g non turbo 4G63 (europe) and turbo 4G63 axles and flywheels are the same. That is good for the OP. But if he uses this F5M31 transmission he would need to get the clutch/pressure plate that corresponds with the F5M31.

Flywheels are the same; axles (more notably, the splined end to the transmission) are not. I realized shortly after I posted that I should have checked and mentioned that as well and the site went down before I could edit.

The axle part numbers in the thread I provided are for F5M31-2-ZVZT, the European transmission. These are not the same numbers for F5M31-2-VVXT (U.S. Spyder) or the F5M33 unit.

This dents my theory on switching the bellhousing, as the axles for the F5M31 would be needed in both the U.S. and European models, making the swap slightly more confusing and/or slightly more costly.

SO - the transmission should bolt up. Whatever transmission it ends up being (F5M31 or F5M33), the clutch disk/pressure plate and axles must be specific to that model transmission.

EDIT: The bolded portion immediately above is not absolutely true. According to multiple posts/sources, you don't have to change the clutch/pressure plate.
http://www.dsmtuners.com/forums/articles-drivetrain/171622-installing-aftermarket-clutch-your-4g64-spyder.html
http://www.4g64.150m.com/performance.html

All the same, be aware of something like this occurring which was my initial fear, there being a difference in the two bell housings and all: http://www.dsmtuners.com/forums/drivetrain-tech/245094-2-4l-trans-vs-2-0l-trans.html


Lilbloody4, Was this F5M31 transmission the one that was on there when you pulled your engine or did you get this somewhere else?

^^^This...
 
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Have you driven a dsm without PS? if not... people should be bitching about you posting misinforming opinions, and not the other way around.

A mis-informing opinion? WTFWTF

I have, its bound to happen owning 5 DSMs. My power steering went out on my last Talon. Its still garbage, and living in Phoenix and Northern Ca. I would never take it out, to each his own. Maybe when I was a kid, boy racer and I didnt care, but deep into my 30s I want it in my car. Im getting too old to be suffering just for 60 pounds. :rolleyes:
 
9!'clipseDOHC no, the trans was on my 7bolt in my 2G and I found a 1G here in germany with a 6bolt w/ the F5M31... I also took the axles with, so I have them... I also put on the clutch that was on there...
 
Thread revival regarding transmission numbers.
I have a 1999 Spyder GST. I’ve had it for 18 years and I know the car came to me as completely stock as it rolled out of the factory.
The top of the bellhousing has ETCHED into it the following KF5M332SPZT
WK8232
The top of the transmission section has has CAST on it F5M31.
Since I know this is the transmission this turbo car rolled out of the factory with, I have to believe that the etched code on the top of the bellhousing takes precedence and this is the slightly beefier F5M33 transmission that comes with the turbo cars.
 
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